Table 2.
R squared values and percentages of variance explained per comorbidity index
| Simple linear regression | EMS at discharge R2 (% of variance) |
EMS gain/day R2 (% of variance) |
BI at discharge R2 (% of variance) |
BI gain/day R2 (% of variance) |
|---|---|---|---|---|
| CCI | 0.042 [−0.034–0.118] (4.2%) | 0.006 [− 0.024–0.036] (0.6%) | 0.037 [− 0.035–0.109] (3.7%) | 0.001 [− 0.011–0.013] (0.1%) |
| Original FCI | 0.043 [− 0.034–0.120] (4.3%) | 0.051 [− 0.032–0.134] (5.1%) | 0.008 [− 0.026–0.042] (0.8%) | 0.007 [− 0.025–0.039] (0.7%) |
| Weighted FCI | 0.216 [0.075–0.357] (21.6%) | 0.122 [0.003–0.241] (12.2%) | 0.192 [0.055–0.329] (19.2%) | 0.036 [− 0.035–0.107] (3.6%) |
| Multiple linear regression model | ||||
| CCI + age & gender | 0.094 [− 0.011–0.199] (9.4%) | 0.177 [0.046–0.308] (17.7%) | 0.107 [− 0.004–0.218] (10.7%) | 0.125 [0.008–0.242] (12.5%) |
| Original FCI + age & gender | 0.082 [− 0.018–0.342] (8.2%) | 0.184 [0.051–0.317] (18.4%) | 0.080 [− 0.019–0.179] (8.0%) | 0.126 [0.008–0.244] (12.6%) |
| w-FCI + age & gender | 0.246 [0.104–0.388] (21.8%) | 0.242 [0.101–0.383] (24.3) | 0.227 [0.087–0.367] (22.7%) | 0.137 [0.016–0.258] (13.7%) |
| CCI + age, gender & function on admission | 0.423 [0.282–0.564] (42.3%) | 0.199 [0.065–0.342] (19.9%) | 0.460 [0.323–0.597] (46.0%) | 0.131 [0.013–0.249] (13.1%) |
| Original FCI + age, gender & function on admission | 0.423 [0.282–0.564] (42.3%) | 0.207 [0.072–0.342] (20.7) | 0.463 [0.326–0.600] (46.3%) | 0.132 [0.014–0.250] (13.2%) |
| w-FCI + age, gender & function on admission | 0.487 [0.353–0.621] (48.7%) | 0.291 [0.148–0.434] (29.1%) | 0.470 [0.334–0.606] (47.0%) | 0.160 [0.034–0.286] (16.0%) |
Abbreviations: EMS elderly mobility scale, FCI functional comorbidity index